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2006 Confidence Interval Detail
234/Van Zandt
234-905/Martins Mill ISD

Category Summary

(1)
Category
(1)
Local
Value
(1)
Stratum
Ratio
(1)
State
Value
(2)
Sample
Size
(3)
Total
Parcels

Stratum
Variance
A 4,385,493 0.9433 4,649,097 8 87 .021491926
A 4,321,020 0.9675 4,466,171 7 48 .049650258
A 4,299,521 1.0289 4,178,755 7 33 .012961458
A 4,046,489 1.0512 3,849,400 6 21 .009242614
D3 59,206,480 0.9512 62,243,987 20 1,875 .067324578
Random Totals: 76,259,003   79,387,410 48 2,064  
Catg D1 Exception Values: 4,209,740   2,802,062      
Total Test Values (4): 80,468,743   82,189,472      

Margin of Error

Margin of Error Percent: 8.8797796
Margin of Error Value: 7,298,244

Confidence Interval Values (5)

State Lower Limit: 74,891,228 (State Test Value minus Margin of Error Percent)
Local Test Value: 80,468,743 (Within Confidence Interval)
State Upper Limit: 89,487,716 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 78,972,031 (See ISD Summary Worksheet)

Sources:
(1) See Stratified Category Worksheet Reports PTS236, PTS430
(2) Number of parcels sampled by staff
(3) Total Category Parcels from Stratification Report, Appraisal Roll, or Self-report
(4) Includes any parcels in A, B, C, D3, F1, G1, G2, or L1 marked as exception properties
(5) Unstudied categories and sub-categories were not included in the Confidence Interval Values
(6) Includes local value of unstudied property categories and sub-categories

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